present perfect simple/continuous?

[haseli22]

Peggy is ready for her exam now. I (help) ……………………… her prepare for it.

5jj: Both forms are possible. The progressive (continuous) form may lay more emphasis on the duration of the helping.

(A few seconds later): My apologies, haseli. I accidentally edited your post instead of responding to it. However, my intended response stands. If you have any doubts, please raise them.

[Tdol]

And I have helped could suggest that you have finished helping her.